JPH032330U - - Google Patents
Info
- Publication number
- JPH032330U JPH032330U JP6128489U JP6128489U JPH032330U JP H032330 U JPH032330 U JP H032330U JP 6128489 U JP6128489 U JP 6128489U JP 6128489 U JP6128489 U JP 6128489U JP H032330 U JPH032330 U JP H032330U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- shutter
- transistor
- motor
- shutter blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Exposure Control For Cameras (AREA)
Description
第１図は本考案の一実施例を示す回路図。第２
図は感温抵抗の特性を示す線図。
Ａ……差動増幅回路、Ｍ……モーター、Ｓ……
シーケンサー回路、Ｔ１……第１のトランジスタ
ー、Ｔ２……第２のトランジスター、ＶＢ……電
源、Ｖｄ……分圧電圧、Ｖｒｅｆ……基準電圧、
ｄ……接続点、ｖｔ……モーター附勢電圧、ｒ…
…固定抵抗、ｒｔ……感温抵抗。
FIG. 1 is a circuit diagram showing an embodiment of the present invention. Second
The figure is a diagram showing the characteristics of temperature-sensitive resistance. A...Differential amplifier circuit, M...Motor, S...
Sequencer circuit, T1 ...first transistor, T2 ...second transistor, VB...power supply, Vd ...divided voltage, Vref ...reference voltage,
d... Connection point, v t ... Motor energizing voltage, r...
...Fixed resistance, r t ...Temperature-sensitive resistance.
Claims (1)
モーターによりシヤツター羽根の開き又は閉じ作
動の少なくとも一方を行うシヤツターに於て、前
記制御回路のモーター駆動回路に対してシヤツタ
ー羽根開閉制御シーケンサー回路によるシヤツタ
ー羽根開閉信号により作動されて前記シヤツター
羽根を作動させるように前記モーターの駆動を制
御する第１のトランジスターと、第２のトランジ
スターとを接続すると共に、一方の入力端子に定
電圧基準電圧が入力され、又他方の入力端子に、
電源及び接地間に接続される感温抵抗及び固定抵
抗の直列回路より成る分圧回路の分圧電圧が入力
されるように接続された差動増幅回路を設けて、
これの出力信号により前記第２のトランジスター
を作動させ、温度変化に応答する前記感温抵抗の
抵抗変化による分圧電圧変化に対応して前記第２
のトラジスターにより前記モーターに供給される
電圧を制御して温度変化によるシヤツター羽根作
動の変動を補正することを特徴とするシヤツター
の温度による特性変化補正装置。 In a shutter that opens or closes at least one of the shutter blades by a motor driven by the automatic exposure control circuit of the camera, the shutter blade opening/closing control sequencer circuit controls the shutter blade opening/closing control sequencer circuit for the motor drive circuit of the control circuit. A first transistor that controls driving of the motor so as to operate the shutter blade by being activated by an opening/closing signal is connected to a second transistor, and a constant voltage reference voltage is input to one input terminal; Also, to the other input terminal,
A differential amplifier circuit connected to input the divided voltage of a voltage dividing circuit consisting of a series circuit of a temperature-sensitive resistor and a fixed resistor connected between a power supply and a ground,
The output signal of this operates the second transistor, and the second
An apparatus for correcting changes in characteristics of a shutter due to temperature, characterized in that the voltage supplied to the motor is controlled by a transistor, thereby correcting fluctuations in shutter blade operation caused by temperature changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6128489U JPH032330U (en) | 1989-05-27 | 1989-05-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6128489U JPH032330U (en) | 1989-05-27 | 1989-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH032330U true JPH032330U (en) | 1991-01-10 |
Family
ID=31589397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6128489U Pending JPH032330U (en) | 1989-05-27 | 1989-05-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032330U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5446037A (en) * | 1977-09-20 | 1979-04-11 | Nippon Chemical Ind | Shutter time and temperature compensating apparatus of camera |
| JPS60254027A (en) * | 1984-05-30 | 1985-12-14 | Seiko Koki Kk | Control circuit of program shutter |
-
1989
- 1989-05-27 JP JP6128489U patent/JPH032330U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5446037A (en) * | 1977-09-20 | 1979-04-11 | Nippon Chemical Ind | Shutter time and temperature compensating apparatus of camera |
| JPS60254027A (en) * | 1984-05-30 | 1985-12-14 | Seiko Koki Kk | Control circuit of program shutter |
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